Rail chair



Sept. 2, 1952 T w, M NDT 2,609,148

RAIL CHAIR Filed July 50, 1946 2 SHEETSSHEET l d I/W E/VTO/ Til-ED075 05 1/. NU VPT Jiem Sept. 2, 1952 Filed July 50, 1946 T. w. MUN-DT 2,609,148

RAIL CHAIR 2 SHEETS-Sl-IEET 2 wnswroe Ha -00.04%; 0 Mun .07"

Patented Sept. 2, 1952 RAIL CHAIR Theodorus W. Mundt, Bilthoven, Netherlands Application July 30, 1946, Serial No. 687,179 In Great Britain September 25, 1945 4 Claims. (Cl. 238-287) This invention relates to chairs for rails, more especially for rails of the Vignole-type, which as far as the applicant is aware, are generally made of cast iron and sometimes of cast steel. Cast iron chairs, however, have the disadvantage that they are too brittle and their bottom faces are never perfectly fiat, so that they are not evenly supported by the sleepers. For this reason they are liable to fracture, especially when the sleepers are frozen hard in which case the greater part of their resiliency is lost.

As to cast steel chairs, these are rather expensive, inter alia owing to the fact that they have to be annealed after casting and that they require a certain amount of finishing.

With a view to overcome these disadvantages, it is suggested according to the invention to weld together two rolled steel bars of appropriate section, which are suitably recessed by punching or stamping operation to provide seats for the rail and for the rail clamps and, if necessary, to cut the structure thus obtained into pieces of proper lengths, so as to form one or a plurality of chairs, whose bottom face in the longitudinal direction of the track, has a width exceeding that of the rail bottom supporting face of the chair, whereby a near approximation of a hinge-joint support of the rail and, consequently, considerable savings in cost of maintenance of the track are realized.

In order that the present invention may be fully understood, it will now be described in furtherdetail with reference to the annexed drawing, in which:

Fig. 1 is a cross section of a rolled steel bar, the dotted lines showing how this bar may be welded to a second bar of the same cross section,

Fig. 2 is a cross sectional view, taken along the line II-II of Fig. 3, of a rail chair and of the sleeper to which it is secured, the rail being shown in side elevation,

Fig. 3 is a side elevational view of the rail chair I of the sleeper, the rail being shown in cross section, and

Fig. 4 is a plan view of Fig. 3.

Fig. 1 illustrates in cross section a rolled steel bar a and, in dotted lines, a second rolled steel bar a of the same cross section disposed alongside bar a but spaced therefrom by a small interval. A steel strip or shim b is interposed between bars a and a and the said three parts are welded together at c and d, at which inwardly directed intermediate ridges and inwardly directed lower or first ridges are positioned which extend from an upright web of each bar. The top ends of said upright webs of said bars are further provided with inwardly directed second ridges, whose ends are spaced apart from each other and apredetermined distance from said intermediate ridges to thereby define a space between the ends of said upper or second ridges and the intermediate ridges which are interconnected at c, as by welding. It is well understood that prior to the welding operation the bars are suitably recessed as by stamping or punching.

It is pertinent here to remark that, when electric resistance welding is used, the bars, a, a are preferably first cut to proper lengths prior to being welded together. In such case strip 1) may be dispensed with. It simply depends upon the length of the bars to be welded together, which welding process applies as the most economical one.

As illustrated in Figs. 2 and 3, the flange of prevented from lateral movement by the clamp ing bolts g and from longitudinal movement byridges of bars a and a.

Since the chair is composed of rolled steel bars,

the generatrices of its bearing face lie in planes that are in exact parallel relation with its bottom face.

1 Should a certain amount of tilt or cant of rail 1 be desired, the resilient sheet e may be made wedge shaped.

If the width of the rail flange exceeds a certain limit and the rail should have the usual tilt of 1:20. it may be advisable to employ a sheet e composed of a hard, wedge-shaped base and a resilient top layer of uniform thickness.

The length of the chair should accord with the purpose for which the chair is to be used. For instance, points, guard rail tracks and'the like require longer chairs than normal, and obviously they should be recessed in accordance with local circumstances. Thus, rolled steel bars of one and the same cross section can be used in the manufacture of rail chairs for different purposes.

It can thus be seen that there has been provided according to this invention a chair for fiatbottom rails comprising a base, and a rail bottom supporting face and composed of two profiled and complementary steel bars of equal cross sections, which bars are rolled in a direction at right angle to the track and united by welding, the width and length of said base substantially exceeding the width and the length, respectively, of said supporting face. Opposite notches are provided in said bars to form seats for said rail and for attaching means therefor.

Having thus described the invention, what is claimed as new and desired to be secured by Letters Patent, is:

1. A chair for flat-bottom rails comprising two profiled and complementary steel bars of equal cross-section punched to provide a rail-bottom supporting face and a substantially fiat bottom face spaced from said supporting face, said bars being rolled in a direction at right angle to the longitudinal axis of said supporting face, said rail bottom supporting face and said bottom face of said steel bars comprising respective ridges extending toward and facing each other, the

ridges forming said rail bottom supporting face.

being welded together, said ridges forming saidflat bottom face being welded together and providing a substantially uninterrupted surface between said steel bars, the width and length of said bottom face substantially exceeding the width and length, respectively, of said supporting face.

2. A steelchair for flat bottom rails comprising a flat. bottom face, and a rail bottom supporting-face extending in substantially parallel relation to each other, two complementary inverted T-bars of substantially equal cross section and each comprising an upstanding web with a flange at substantially right angles thereto and extending oneither side thereof, said bars having their rolling direction at right angles'to the longitudinal axis of the rails and being disposed side by side with the bottom faces of their flanges flush and united by welding at the inner edges of said flanges, the web of each bar further being provided on its inner face with a first ridge extending along the top edge of the web inwardly a predetermined distance which is substantially smaller than the flange of the bar, a ridge intermediate said first ridge and said flange and extending inwardly the same distance as said flange, the intermediate ridges of the bars being united by welding along their inner edges to form said rail bottom supporting face, said webs being recessed to allow a rail to be seated on said supporting face.

3'. A steel chair for flat bottom rails comprising two complementary inverted T-bars substantially equal in cross section and having their rolling direction at right angles to the longitudinal axis of said rails, said T-bars being disposed in facing relation to each other and each including a substantially upright web, a flange extending at right angles to said web and at either side thereof, whereby a first inner ridge is formed providing a flat bottom face with the remainder of said flange, a second inner ridge extending substantially parallel to said first ridge and in the same direction thereof at the top of said web, saidsecond ridge being shorter in length than said first ridge, and an intermediate inner ridge extending from said web a predetermined distance below said inner second ridge and being coextensive with said first ridge, said first ridges of said T-bars being welded together to thereby form a substantially flat and continuous bottom face at said flanges of said T-bars, said intermediate ridges being united by welding to thereby obtain a substantially flat rail bottom supporting face whereby a rail may be seated on said supporting face, said second ridges being spaced from 'each other a predetermined distance and from said intermediate ridges so as to allow accommodation of a predetermined rail profile within the space defined by said second ridges and said rail bottom supporting face.

4. A steel chair for flat bottom rails comprising two complementary inverted T-bars substantially equal in cross section and having their rolling direction at right angles to the longitudinal axis of said rails, said T-bars being disposed opposite each other and including substantially upright webs, a flange extending at right angles to and outwardly from each web, first inner ridges extending inwardly from said webs and substantially in alignment with said flanges to thereby form a substantially flat bottom face, second ridges extending inwardly toward each other from said Webs and substantially parallel to said first ridges at the top of said webs, the ends of said second ridges being spaced from each other, and intermediate inner ridges extending from said web and a predetermined distance below said second ridges, said intermediate ridges being coextensive with said first ridges, said first ridges of said T-bars being welded together to thereby form a substantially flat and continuous bottom face with said flanges of said T-bars, said intermediate ridges being united by welding to thereby obtain a substantiallyflat and continuous railbottom supporting face whereby a rail may be seated on. said supporting face.

' THEODORUS W. MUNDT.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS- 

